WO2008002300A1 - Retractable stop for maintaining overhead clearance above an elevator car - Google Patents
Retractable stop for maintaining overhead clearance above an elevator car Download PDFInfo
- Publication number
- WO2008002300A1 WO2008002300A1 PCT/US2006/024983 US2006024983W WO2008002300A1 WO 2008002300 A1 WO2008002300 A1 WO 2008002300A1 US 2006024983 W US2006024983 W US 2006024983W WO 2008002300 A1 WO2008002300 A1 WO 2008002300A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stop member
- assembly
- employed
- elevator car
- pin
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
- B66B5/0081—Safety of maintenance personnel by preventing falling by means of safety fences or handrails, being operable or not, mounted on top of the elevator car
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
- B66B5/0056—Safety of maintenance personnel by preventing crushing
Definitions
- This invention generally relates to elevator systems. More particularly, this invention relates to maintaining a safe overhead clearance above an elevator car during maintenance or inspection.
- Elevator systems include a variety of safety devices for different conditions.
- One type of such safety device is shown in the Swiss patent document 667,638 and includes a support in the pit of a hoistway that is moveable into a position to contact the bottom of an elevator car to prevent the car from entering the pit.
- Another device is shown in U.S. Patent No. 5,727,657. That device has a similar function and a powered actuator for moving the blocking device.
- An exemplary elevator assembly includes an elevator car and a counterweight coupled with the elevator car. At least one safety device is supported on top of the elevator car. A stop member automatically moves responsive to an indication from the safety device from a retracted position to an employed position where the stop member limits movement of the counterweight in a downward direction to thereby limit movement of the elevator car in an upward direction.
- the indication from the safety device is one that an individual is on top of the elevator car.
- the safety device is a balustrade that is moveable into an inspection mode position on top of the elevator car and the stop member in this example moves into the employed position responsive to the balustrade being in the inspection mode position.
- An exemplary assembly for limiting movement of an elevator counterweight includes a stop member pivotally supported near a first end of the stop member such that the stop member is moveable between a retracted position and an employed position. In the retracted position, a second, opposite end of the stop member is generally vertically aligned with the first end. In the employed position, the second end is vertically offset from the first end and the stop member is at an oblique angle relative to the retracted position.
- a guide member near the second end of the stop member has a first portion that is pivotally connected to the stop member.
- a second portion of the guide member has at least one arm for engaging a stationary vertical surface such that the guide member limits a distance that the second end of the stop member moves in a horizontal direction as the stop member moves from the retracted position to the employed position.
- Figure 1 schematically illustrates selected portions of an elevator system that is useful with an embodiment of this invention.
- Figure 2 is a perspective illustration of an example assembly for limiting movement of a counterweight in a downward direction.
- Figure 3 is a perspective illustration of the embodiment of Figure 2 from another view and in another position.
- This invention facilitates maintaining a desired amount of overhead clearance above an elevator car within a hoistway.
- An assembly is situated for limiting movement of a counterweight in a downward direction. Preventing the counterweight from moving below a desired level ensures that the associated elevator car will not move above a selected height within the hoistway.
- at least one safety device on top of an elevator car provides an indication for when to move a stop member into a position to limit downward movement of the counterweight for providing the desired overhead clearance above the elevator car.
- Figure 1 schematically illustrates selected portions of an elevator system 20 that includes an elevator car 22 coupled with a counterweight 24 for vertical movement within a hoistway 26 in a generally known manner.
- the counterweight 24 and elevator car 22 are coupled using roping or belts in a known configuration.
- An assembly 30 includes a stop member 32 that is selectively positioned to limit the downward movement of the counterweight 24 within the hoistway 26. By preventing the counterweight 24 from dropping below a selected level, the elevator car 22 is prevented from rising above a selected height.
- a holding member 34 maintains the stop member 32 in a retracted position for normal elevator system operation when the counterweight 24 is allowed to move very close to the bottom 36 of the hoistway 26 and the elevator car 22 is allowed to move very close to the top 38 of the hoistway 26.
- an example assembly 30 includes a mounting channel 40 that is secured to a stationary vertical surface.
- the mounting channel 40 is secured to a guide rail 42 by a plurality of fasteners 44.
- the guide rail 42 is useful for guiding vertical movement of at least one of the elevator car 22 or the counterweight 24 within the hoistway 26, for example.
- the mounting channel 40 is aligned parallel with the guide rail 42, which is secured in a stationary, vertical position within the hoistway 26 in a known manner.
- the stop member 32 includes a first end 50 that is pivotally supported by the mounting channel 40 at a pivot connection 52. A second, opposite end 54 of the stop member 32 is vertically aligned with the first end 50 when the stop member 32 is in the retracted position shown in Figure 3. The stop member 32 is held in the retracted position shown in Figure 3 by the holding member 34.
- the second end 54 falls away from the mounting channel 40 into the employed position shown in Figure 2.
- This example includes a guide member 60 that limits the amount of horizontal distance between the second end 54 of the stop member 32 and the mounting channel 40. Stated another way, the guide member 60 controls the oblique angle at which the stop member 32 is oriented relative to the mounting channel 40 when the stop member 32 is in the employed position where it will limit the downward vertical movement of the counterweight 24.
- the guide member 60 has a first portion 62 that is pivotally mounted to the stop member 32 near the first end 54.
- the first portion 62 comprises a strike plate that covers over the second end 54 of the stop member 32 when the stop member 32 is in the employed position of Figure 2.
- the strike plate of the first portion 62 makes physical contact with a corresponding portion of the elevator counterweight 24 if the counterweight 24 moves sufficiently low within the hoistway.
- a second portion 64 of the guide member 60 in this example includes two arms that engage a fixed vertical surface such as a surface on the guide rail 42.
- the arms in this example are generally L-shaped projections extending from the strike plate of the first portion 62 of the guide member 60.
- the first portion 62 includes a slot 66 that follows a pin or protrusion 68 on the stop member 32 near the second end 54.
- the guide member 60 provides a stable and reliable control of the position of the stop member 32 relative to the mounting channel 40 and guide rail 42.
- the stop member 32, mounting channel 40 and guide member 60 all comprise metal components.
- the holding member 34 includes a pin 72 that protrudes into at least one opening 70 in a side of the example stop member 32.
- the pin 72 moves in a direction that is generally perpendicular to the direction of movement of the stop member 32 between the retracted position and the employed position.
- the holding member 34 includes an electrically powered actuator such as a solenoid coil that controls position of the pin 72.
- the pin 72 is moved by the actuator portion of the holding member 34 so that the pin 72 is retracted away from the stop member 32 whenever it is desirable for the stop member 32 to move into the employed position.
- the illustrated example includes at least one switch 74 for providing an indication of the current position of the stop member 32.
- the switch 72 may provide an indication of when the stop member 32 is in the retracted position, in the employed position or both.
- the holding member 34 is controlled responsive to an indication from at least one safety device on top of the elevator car 22.
- the illustrated example includes a balustrade or barricade 80 that can selectively be placed in position on top of the elevator car 22 by an individual 82.
- a switch or sensor that detects that position provides an indication to the holding member 34 to retract the pin 72 to allow the stop member 32 to move into the employed position.
- Other safety devices may be used for the same purpose alone or in combination with one or more safety devices.
- the illustrated example includes at least one sensor 84 for detecting the weight of the individual 82 on top of the elevator car 22.
- Another sensor 86 uses known technology such as a motion detector or a light line sensor for detecting the presence of the individual 82 on top of the elevator car 22.
- Another example safety device shown in Figure 1 is a control panel 88 on top of the elevator car 22 that includes at least one switch that can be manipulated by an authorized individual 82 for a desired function when the elevator system 20 is in an inspection mode. Activation of such a switch in one example provides the indication to the holding member 34 to allow the stop member 32 to move into the employed position.
- control panel 88 also includes an indicator for providing at least one of a visible (e.g., light) or audible indication of the position of the stop member 32 that is discernable from the top of the elevator car 22.
- a visible or audible indication is provided on top of the elevator car 22 to provide assurance to the individual 82 regarding the function of the stop member 32 for maintaining adequate overhead clearance above the elevator car 22.
- the illustrated example includes another indicator 90 supported within the hoistway 26 in a position where it can be observed (e.g., heard or seen) by the individual 82 on top of the elevator car 22.
- An indicator on the control panel 88, the indicator 90 or a combination of them may be used to meet the needs of a particular situation.
- the disclosed example includes an automated release of the stop member 32 into an employed position.
- the illustrated example is manually moved back into a retracted position after the overhead clearance provided by the stop member 32 is no longer needed.
- the holding member 34 then maintains the stop member in that position until the next time it is needed to provide overhead clearance above the elevator car 22.
- the holding member 34 responds to the stop member 32 moving into the retracted position by allowing the pin 72 to extend from the actuator so that the pin 72 is received in the opening 70, for example.
- a separate switch that is manually controllable is used to release the pin 72 into a holding position.
- the disclosed example provides an improved way of ensuring adequate overhead clearance above an elevator car 22 in a so-called low overhead elevator system.
Landscapes
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES06774106.6T ES2527745T3 (en) | 2006-06-26 | 2006-06-26 | Retractable stop to maintain a free space above a lift cabin |
JP2009518067A JP5129811B2 (en) | 2006-06-26 | 2006-06-26 | Retractable stop device that maintains overhead clearance above the elevator car |
ES09003873.8T ES2523199T3 (en) | 2006-06-26 | 2006-06-26 | Retractable stop to maintain a higher clearance above an elevator car |
EP06774106.6A EP2038198B1 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
PCT/US2006/024983 WO2008002300A1 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
CN2006800550950A CN101472824B (en) | 2006-06-26 | 2006-06-26 | Retractable stopper for maintaining overhead clearance above elevator cage |
US12/299,201 US8028808B2 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
EP09003873.8A EP2070858B1 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
HK09112068.3A HK1134922A1 (en) | 2006-06-26 | 2009-12-22 | Retractable stop for maintaining overhead clearance above an elevator car |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2006/024983 WO2008002300A1 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008002300A1 true WO2008002300A1 (en) | 2008-01-03 |
Family
ID=37745846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2006/024983 WO2008002300A1 (en) | 2006-06-26 | 2006-06-26 | Retractable stop for maintaining overhead clearance above an elevator car |
Country Status (7)
Country | Link |
---|---|
US (1) | US8028808B2 (en) |
EP (2) | EP2070858B1 (en) |
JP (1) | JP5129811B2 (en) |
CN (1) | CN101472824B (en) |
ES (2) | ES2523199T3 (en) |
HK (1) | HK1134922A1 (en) |
WO (1) | WO2008002300A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101941622A (en) * | 2010-08-23 | 2011-01-12 | 苏州巨立电梯有限公司 | Intelligent guardrail positioned on car top of elevator |
WO2011128718A1 (en) * | 2010-04-12 | 2011-10-20 | Otis Elevator Company | Retractable stop for low overhead elevators |
CN102862889A (en) * | 2012-09-29 | 2013-01-09 | 苏州新里程电控系统有限公司 | Protective guard for elevators |
FR2977881A1 (en) * | 2011-07-13 | 2013-01-18 | Arnoult Patrice | Device for locking cabin of lift shaft at predetermined distance from ceiling or floor, has stopping unit locking cabin on detection of access by detection unit, and on detecting that cabin has reached intervention position |
CN102910516A (en) * | 2012-11-09 | 2013-02-06 | 江南嘉捷电梯股份有限公司 | Rotary car top guard |
US20140360818A1 (en) * | 2011-12-21 | 2014-12-11 | Otis Elevator Company | Elevator system including a car stop for maintaining overhead clearance |
WO2015110696A1 (en) * | 2014-01-21 | 2015-07-30 | Kone Corporation | Elevator provided with a safety device arrangement |
WO2019092003A1 (en) * | 2017-11-09 | 2019-05-16 | Inventio Ag | Elevator car |
WO2020127493A1 (en) * | 2018-12-19 | 2020-06-25 | Inventio Ag | Device for creating a temporary protective space |
EP3760561A1 (en) * | 2019-07-05 | 2021-01-06 | Otis Elevator Company | Elevator assembly with counterweight blocking stop |
US11078043B2 (en) | 2017-05-12 | 2021-08-03 | Otis Elevator Company | Elevator overrun systems |
EP4328165A1 (en) * | 2022-08-25 | 2024-02-28 | Otis Elevator Company | Safety system for an elevator |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008004022A1 (en) * | 2006-06-30 | 2008-01-10 | Otis Elevator Company | Elevator having a shallow pit and/or a low overhead |
FI119808B (en) * | 2007-12-17 | 2009-03-31 | Kone Corp | Elevator bumper arrangement |
FI121423B (en) * | 2009-04-23 | 2010-11-15 | Kone Corp | Safety arrangement for a lift |
WO2012025774A1 (en) * | 2010-08-25 | 2012-03-01 | Otis Elevator Company | Device for controlling the position of a blocking member in an elevator system |
BR112014008542A2 (en) * | 2011-10-13 | 2017-04-18 | Inventio Ag | elevator |
US10486950B2 (en) * | 2014-07-16 | 2019-11-26 | Gray Manufacturing Company, Inc. | Down stop indicator for vehicle lift |
JP6252391B2 (en) * | 2014-07-22 | 2017-12-27 | 三菱電機ビルテクノサービス株式会社 | Elevator collision prevention device |
EP3353106A1 (en) * | 2015-09-25 | 2018-08-01 | Otis Elevator Company | Accessible elevator buffer |
CN105712145A (en) * | 2016-04-25 | 2016-06-29 | 上海爱登堡电梯(宜昌)有限公司 | Counter-weight mechanical blocking device for elevator |
EP3257800B1 (en) * | 2016-06-15 | 2019-02-27 | KONE Corporation | An elevator |
EP3315445B1 (en) * | 2016-10-27 | 2022-04-13 | KONE Corporation | Elevator safety arrangement and elevator |
EP3336032B1 (en) | 2016-12-14 | 2020-10-14 | Otis Elevator Company | Elevator safety system and method of operating an elevator system |
PL3814265T3 (en) * | 2018-06-28 | 2022-09-05 | Inventio Ag | Lift assembly with a protection screen |
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CH667638A5 (en) | 1985-09-27 | 1988-10-31 | Inventio Ag | Safety device for maintenance space under lift cabin - has prop swung outwards under cabin after carrier arm has been positioned |
US5727657A (en) | 1995-01-31 | 1998-03-17 | Inventio Ag | Apparatus for blocking elevator car travel |
DE10052459A1 (en) * | 2000-10-23 | 2002-05-02 | Mueller Wolfgang T | Devices for formation of protection space for lifts without machine space with reduced shaft has retractable apron designed as stable frame open upwards which is slid in guides mounted on cabin or in shaft head |
EP1207129A2 (en) * | 2000-11-02 | 2002-05-22 | Alimak Ab | Arrangement to create safety zones for a hoist |
EP1479636A1 (en) * | 2003-05-21 | 2004-11-24 | Inventio Ag | Buffer that can create a safety inspection zone for elevators |
WO2005026033A1 (en) * | 2003-09-15 | 2005-03-24 | Otis Elevator Company | Elevator inspection safety devices |
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JPH0649577Y2 (en) * | 1987-11-27 | 1994-12-14 | 株式会社日立ビルシステムサービス | Elevator maintenance operation equipment |
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US5773771A (en) * | 1996-07-30 | 1998-06-30 | Chatham; Charles | Apparatus for preventing unintended movement of elevator car |
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DE10108772A1 (en) * | 2001-02-23 | 2002-11-21 | Otis Elevator Co | Elevator safety device |
US6481534B1 (en) * | 2001-08-27 | 2002-11-19 | Otis Elevator Company | Apparatus for maintaining adequate overhead space for car top mechanics in elevator systems |
JP2004115244A (en) * | 2002-09-27 | 2004-04-15 | Toshiba Elevator Co Ltd | Maintenance and inspection method for elevator and stopper for maintenance and inspection |
DE602004001274T2 (en) * | 2003-03-31 | 2007-05-31 | Inventio Ag, Hergiswil | Holding bar for the creation of a temporary security room in a lift shaft |
NZ532767A (en) * | 2003-05-21 | 2004-12-24 | Inventio Ag | Lift installation with a buffer for creating a zone of protection in a lift installation and a method of creating a zone of protection |
JP4712313B2 (en) * | 2003-05-21 | 2011-06-29 | インベンテイオ・アクテイエンゲゼルシヤフト | Buffer and elevator equipment with buffer |
US7650969B2 (en) * | 2004-12-03 | 2010-01-26 | Otis Elevator Company | Safety device for use in an elevator system including a triggering member for activating a safety brake |
-
2006
- 2006-06-26 US US12/299,201 patent/US8028808B2/en active Active
- 2006-06-26 JP JP2009518067A patent/JP5129811B2/en not_active Expired - Fee Related
- 2006-06-26 WO PCT/US2006/024983 patent/WO2008002300A1/en active Application Filing
- 2006-06-26 EP EP09003873.8A patent/EP2070858B1/en active Active
- 2006-06-26 EP EP06774106.6A patent/EP2038198B1/en active Active
- 2006-06-26 ES ES09003873.8T patent/ES2523199T3/en active Active
- 2006-06-26 ES ES06774106.6T patent/ES2527745T3/en active Active
- 2006-06-26 CN CN2006800550950A patent/CN101472824B/en active Active
-
2009
- 2009-12-22 HK HK09112068.3A patent/HK1134922A1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH667638A5 (en) | 1985-09-27 | 1988-10-31 | Inventio Ag | Safety device for maintenance space under lift cabin - has prop swung outwards under cabin after carrier arm has been positioned |
US5727657A (en) | 1995-01-31 | 1998-03-17 | Inventio Ag | Apparatus for blocking elevator car travel |
DE10052459A1 (en) * | 2000-10-23 | 2002-05-02 | Mueller Wolfgang T | Devices for formation of protection space for lifts without machine space with reduced shaft has retractable apron designed as stable frame open upwards which is slid in guides mounted on cabin or in shaft head |
EP1207129A2 (en) * | 2000-11-02 | 2002-05-22 | Alimak Ab | Arrangement to create safety zones for a hoist |
EP1479636A1 (en) * | 2003-05-21 | 2004-11-24 | Inventio Ag | Buffer that can create a safety inspection zone for elevators |
WO2005026033A1 (en) * | 2003-09-15 | 2005-03-24 | Otis Elevator Company | Elevator inspection safety devices |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011128718A1 (en) * | 2010-04-12 | 2011-10-20 | Otis Elevator Company | Retractable stop for low overhead elevators |
CN102822077A (en) * | 2010-04-12 | 2012-12-12 | 奥的斯电梯公司 | Retractable stop for low overhead elevators |
JP2013523565A (en) * | 2010-04-12 | 2013-06-17 | オーチス エレベータ カンパニー | Retractable stop for low overhead elevator |
EP2558393A4 (en) * | 2010-04-12 | 2018-01-24 | Otis Elevator Company | Retractable stop for low overhead elevators |
US9505588B2 (en) | 2010-04-12 | 2016-11-29 | Otis Elevator Company | Retractable stop for low overhead elevators |
CN101941622A (en) * | 2010-08-23 | 2011-01-12 | 苏州巨立电梯有限公司 | Intelligent guardrail positioned on car top of elevator |
FR2977881A1 (en) * | 2011-07-13 | 2013-01-18 | Arnoult Patrice | Device for locking cabin of lift shaft at predetermined distance from ceiling or floor, has stopping unit locking cabin on detection of access by detection unit, and on detecting that cabin has reached intervention position |
US9764925B2 (en) * | 2011-12-21 | 2017-09-19 | Otis Elevator Company | Elevator system including a car stop for maintaining overhead clearance |
US20140360818A1 (en) * | 2011-12-21 | 2014-12-11 | Otis Elevator Company | Elevator system including a car stop for maintaining overhead clearance |
CN102862889A (en) * | 2012-09-29 | 2013-01-09 | 苏州新里程电控系统有限公司 | Protective guard for elevators |
CN102910516A (en) * | 2012-11-09 | 2013-02-06 | 江南嘉捷电梯股份有限公司 | Rotary car top guard |
WO2015110696A1 (en) * | 2014-01-21 | 2015-07-30 | Kone Corporation | Elevator provided with a safety device arrangement |
US10221042B2 (en) | 2014-01-21 | 2019-03-05 | Kone Corporation | Elevator provided with a safety device arrangement |
US11078043B2 (en) | 2017-05-12 | 2021-08-03 | Otis Elevator Company | Elevator overrun systems |
WO2019092003A1 (en) * | 2017-11-09 | 2019-05-16 | Inventio Ag | Elevator car |
WO2020127493A1 (en) * | 2018-12-19 | 2020-06-25 | Inventio Ag | Device for creating a temporary protective space |
CN113226966A (en) * | 2018-12-19 | 2021-08-06 | 因温特奥股份公司 | Device for providing temporary protective space |
CN113226966B (en) * | 2018-12-19 | 2023-03-14 | 因温特奥股份公司 | Device for providing temporary protective space |
EP3760561A1 (en) * | 2019-07-05 | 2021-01-06 | Otis Elevator Company | Elevator assembly with counterweight blocking stop |
US11591184B2 (en) | 2019-07-05 | 2023-02-28 | Otis Elevator Company | Elevator assembly with counterweight blocking stop |
EP4328165A1 (en) * | 2022-08-25 | 2024-02-28 | Otis Elevator Company | Safety system for an elevator |
Also Published As
Publication number | Publication date |
---|---|
EP2038198A1 (en) | 2009-03-25 |
ES2523199T3 (en) | 2014-11-21 |
CN101472824B (en) | 2011-12-21 |
CN101472824A (en) | 2009-07-01 |
JP2009541182A (en) | 2009-11-26 |
EP2038198B1 (en) | 2014-12-24 |
US20090183955A1 (en) | 2009-07-23 |
HK1134922A1 (en) | 2010-05-20 |
EP2070858B1 (en) | 2014-10-15 |
EP2070858A1 (en) | 2009-06-17 |
ES2527745T3 (en) | 2015-01-29 |
US8028808B2 (en) | 2011-10-04 |
JP5129811B2 (en) | 2013-01-30 |
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